package com.orange.cetback.interceptor;

import com.alibaba.fastjson.JSON;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.orange.cetback.common.constant.JwtClaimsConstant;
import com.orange.cetback.common.context.BaseContext;
import com.orange.cetback.common.exception.BaseException;
import com.orange.cetback.common.properties.JwtProperties;
import com.orange.cetback.common.utils.JwtUtil;
import com.orange.cetback.common.vo.Result;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getTokenName());

        //2、校验令牌
        if(token != null){
            try {
                log.info("jwt校验:{}", token);
                Claims claims = JwtUtil.parseJWT(jwtProperties.getSecretKey(), token);
                Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
                log.info("当前用户的id：{}", userId);
                BaseContext.setCurrentId(userId);
                //3、通过，放行
                return true;
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        log.debug(request.getRequestURI() + " 禁止访问...");
        response.setContentType("application/json;charset=utf-8");
        response.getWriter().write(JSON.toJSONString(Result.fail(203,"jwt令牌无效，请重新登录")));
        return false;
    }
}
